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首页> 外文期刊>Cell and Tissue Research >Stress or injury induces cellular plasticity in salivary gland acinar cells
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Stress or injury induces cellular plasticity in salivary gland acinar cells

机译:压力或损伤在唾液腺缩醛细胞中诱导细胞塑性

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摘要

Salivary gland function is severely disrupted by radiation therapy used to treat patients diagnosed with head and neck cancer and by Sjogren's syndrome. The resulting condition, which results in xerostomia or dry mouth, is due to irreversible loss of the secretory acinar cells within the major salivary glands. There are presently no treatments for the resolution of xerostomia. Cell-based approaches could be employed to repopulate acinar cells in the salivary gland but investigations into potential therapeutic strategies are limited by the challenges of maintaining and expanding acinar cells in vitro. We investigate the encapsulation of salivary gland cell aggregates within PEG hydrogels as a means of culturing secretory acinar cells. Lineage tracing was used to monitor the fate of acinar cells isolated from murine submandibular gland (SMG). Upon initial formation in vitro, SMG aggregates comprise both acinar and duct cells, with the majority cells of acinar origin. With longer culture times, acinar cells significantly decreased the expression of specific markers and activated the expression of keratins normally found in duct cells. A similar acinar-to-duct cell transition was also observed in vivo, following duct ligation injury. These results indicate that under conditions of stress (mechanical and enzymatic isolation from glands) or injury (duct ligation), salivary gland acinar cells exhibit plasticity to adopt a duct cell phenotype.
机译:唾液腺函数被用于治疗头颈癌和Sjogren综合征的患者治疗患者的放射治疗严重破坏。产生的条件导致挠性孢子或口腔,是由于主要唾液腺内的分泌缩醛细胞不可逆损失是导致的。目前没有治疗Xerostomia的分辨率。可以使用基于细胞的方法来重新灌注唾液腺中的腺苷细胞,但调查潜在的治疗策略受到体外维持和扩张癌细胞的挑战的限制。我们研究PEG水凝胶中的唾液腺细胞聚集体作为培养分泌缩醛细胞的方法的封装。使用谱系追踪来监测从鼠颌下腺(SMG)中分离的腺体细胞的命运。在体外初始形成时,SMG聚集体包含丙氨酸和管道细胞,具有大多数细胞的丙氨酸起源。具有更长的培养时间,缩醛细胞显着降低了特异性标记的表达,并激活了通常在管道细胞中发现的角蛋白的表达。在导管结扎损伤之后,还观察到类似的酰胺 - 导管细胞转变。这些结果表明,在应力条件下(机械和酶促分离的腺体)或损伤(导管结扎),唾液腺缩醛细胞表现出可塑性,以采用管道细胞表型。

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